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#1 – Great Wall of China
Most famous and expensive wall of all times!
via www.shedexpedition.comcomplain
The Great Wall of China is undoubtedly impressive! The wall that is 4.5 km long is the only man-made construction on Earth that is seen from the outer space. The creation of the wall took 2 hundred years. This is the most expensive man-made construction - 260 billion dollars.
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